• 
  Administer, configure, and maintain application environments
  supporting payment systems
• 
  Monitor application performance, stability, and operational
  continuity
• 
  Support application servers and resolve incidents or operational
  issues
• 
  Verify and implement production changes in controlled environments
• 
  Participate in application migration activities within the data
  centre programme
• 
  Collaborate with internal teams, external vendors, and
  international stakeholders
• 
  Support environment setup, configuration, and access preparation
  for migration phases
• 
  Diagnose and resolve technical issues impacting application
  environments
• 
  Maintain
  documentation and operational knowledge in Confluence

Requirements

• 
  Experience in application operations or application administration roles
• 
  Experience supporting environments during infrastructure or data centre
  migrations
• 
  Strong scripting skills in at least one of the following: Perl, PowerShell,
  Shell, Bash, or Python
• 
  Experience working with PL/SQL or T-SQL
• 
  Understanding of application infrastructure including networking, load
  balancing, TLS, and resilience
• 
  Experience supporting high-availability transaction systems
• 
  Knowledge of monitoring, performance optimisation, and reliability in
  transactional environments
• 
  Strong collaboration skills in international team setups
• 
  Fluent Polish and
  English

• 
  Experience in payments, acquiring, or card
  processing environments
• 
  Exposure to large-scale enterprise transformation
  programmes
• 
  Experience working with middleware or integration
  layers
• 
  Familiarity
  with release management and change governance processes

Benefits

• 
  Solid, competitive salary
• 
  Work in a multinational environment on international projects
• 
  Comprehensive healthcare
• 
  Long-term B2B contract with a stable project pipeline
• 
  Work model: Warsaw-based, primarily onsite with
  1–2 remote days per month